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Development Of Nox Sensors For Heavy Vehicle Applications
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Book Synopsis Development of NOx Sensors for Heavy Vehicle Applications by :
Download or read book Development of NOx Sensors for Heavy Vehicle Applications written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A DOE CRADA was initiated in February 2000 between Ford Motor Company and the US Department of Energy's Oak Ridge National Laboratory (ORNL). The overall objective of the research agreement was to characterize the performance of emission sensors and identify potential areas of improvement and to develop improved insulating materials with a lower capacitance to minimize radio frequency (RF) interference. A bench-scale device was developed at ORNL to evaluate sensor performance. The test stand was designed to enable control of the gas composition, flow rate, and temperature. An air-actuated three-way valve was used to control the injection of the test gas in order to elucidate the transient behavior of the sensor. The major finding from the studies was that transient test results showed that response time of the sensor to NO was highly dependent on the temperature. The time constant decreased with increasing gas temperature and achieved a constant valve of 610 ms for temperatures greater than or equal to 350 C. The steady-state valves O2 and NOx pumping currents were measured under steady-state conditions using a picoammeter. The measured pumping currents were extremely low and required an electrically quiet environment for accurate readings. ORNL developed also modified the existing insulator material to decrease its dielectric constant in order to reduce radio frequency interference from the internal heater. This was accomplished by adding low dielectric constant sintering aids to alumina.
Book Synopsis Development of NOx Sensors for Heavy Vehicle Applications by : D. L. West
Download or read book Development of NOx Sensors for Heavy Vehicle Applications written by D. L. West and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary gaseous pollutants (excluding CO{sub 2}) produced by combustion of low-sulfur diesel fuel oxides of nitrogen (NO{sub x}), carbon monoxide (CO), and hydrocarbons (C{sub y}H{sub z}). The last two of these can be readily ameliorated by an oxidation catalyst in the O{sub 2}-rich environment of diesel exhaust but NO{sub x} can not.[1] For this reason NO{sub x} remediation strategies such as selective catalytic reduction (SCR) [2, 3] and the lean NO{sub x} trap (LNT) [4, 5] are being actively pursued. The ideal implementation of these strategies would employ NO{sub x} sensors to control reagent injection in the case of SCR and trap regeneration in the case of LNT. Two different NO{sub x} sensors for this application are at or near commercialization: An amperometric NO{sub x} sensor developed by NGK [6] and a 'mixed potential' NO{sub x} sensor developed by Riken [7]. The NGK sensor works by passing the sampled exhaust through a series of two chambers. In the first chamber O{sub 2} is pumped from the exhaust and in the second, NO{sub x} is decomposed electrochemically and the current from this decomposition is measured in order to determine [NO{sub x}]. Since the NO{sub x} concentrations can be small, on the 10's of ppm levels, the currents produced by decomposing the NO{sub x} can be small and difficult to measure accurately. The Riken sensor functions by passing the exhaust over a 'conversion electrode' that converts the NO{sub x} to NO{sub 2}. This NO{sub 2} is then sensed by a mixed potential sensing element.[8-10] Researchers at Ford evaluated the NGK sensor and observed the above shortcoming (poor for low [NO{sub x}]) as well as others [11] (e.g., asymmetric response to NO vs. NO{sub 2}) and were unable to obtain samples of the Riken sensor. Therefore a CRADA was initiated between Ford an ORNL to investigate the development of NO{sub x} sensors for diesel exhaust applications.
Book Synopsis Development and Characterization of Ceramic-based NOx Sensors for Automotive Applications by : Liming Wang
Download or read book Development and Characterization of Ceramic-based NOx Sensors for Automotive Applications written by Liming Wang and published by . This book was released on 1998 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2002 Annual Technical Report by :
Download or read book Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2002 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment Publisher : ISBN 13 : Total Pages :1538 pages Book Rating :4.:/5 (327 download)
Book Synopsis Fiscal Year 2001 Budget Authorization Request by : United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment
Download or read book Fiscal Year 2001 Budget Authorization Request written by United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment and published by . This book was released on 2001 with total page 1538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies Publisher : ISBN 13 : Total Pages :1106 pages Book Rating :4.F/5 ( download)
Book Synopsis Department of the Interior and related agencies appropriations for 2004 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies
Download or read book Department of the Interior and related agencies appropriations for 2004 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 2003 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Commercial Sensor Manufacturing Methods for NOx by :
Download or read book Application of Commercial Sensor Manufacturing Methods for NOx written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research effort is to develop a low cost on-board Nitrogen Oxide (NO(subscript x))/Ammonia (NH3) sensor that can not only be used for emissions control but has the potential to improve efficiency through better monitoring of the combustion process and feedback control in both vehicle and stationary systems. Over the past decade, Los AJamos National Laboratory (LANL) has developed a unique class of electrochemical gas sensors for the detection of carbon monoxide, hydrocarbons, hydrogen and nitrogen oxides. These sensors are based on the mixed-potential phenomenon and are a modification of the existing automotive lambda (oxygen) sensor and have the potential to meet the stringent sensitivity, selectivity and stability requirements of an on-board emissions/engine control sensor system. The current state of the art LANL technology is based on the stabilization of the electrochemical interfaces and relies on an externally heated, hand-made, tape cast device. We are now poised to apply our patented sensing principles in a mass production sensor platform that is more suitable for real world engine-out testing such as on dynamometers for vehicle applications and for exhaust-out testing in heavy boilers/SCR systems in power plants. In this present work, our goal is to advance towards commercialization of this technology by packaging the unique LANL sensor design in a standard automotive sensor-type platform. This work is being performed with the help of a leading US technical ceramics firm, utilizing commercial manufacturing techniques. Initial tape cast platforms with screen printed metal oxide and Pt sensor electrodes have shown promising results but also clearly show the need for us to optimize the electrode and electrolyte compositions/morphologies and interfaces of these devices in order to demonstrate a sensitive, selective, and stable NO(subscript x) sensor. Our previous methods and routes to preparing stable and reproducible mixed potential sensors - in bulk, tape cast, and thin film variants - need to be adapted as a necessary adjunct to address materials challenges resulting from the implementation of commercial manufacturing methods. We also modified the electrodes to demonstrate a NH3 sensor that can be used in conjunction with the NO(subscript x) sensor for feedback control of emissions systems. Once desirable properties are achieved, we will work closely with potential customers in order to dynamometer and boiler test these devices. Ultimately, this will accurately gauge the level of readiness of mixed potential sensor technology for commercialization and eventual use of this important electrochemical technology.
Book Synopsis Advanced Direct Injection Combustion Engine Technologies and Development by : H Zhao
Download or read book Advanced Direct Injection Combustion Engine Technologies and Development written by H Zhao and published by Elsevier. This book was released on 2009-12-18 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 of the two-volume set Advanced direct injection combustion engine technologies and development investigates diesel DI combustion engines, which despite their commercial success are facing ever more stringent emission legislation worldwide. Direct injection diesel engines are generally more efficient and cleaner than indirect injection engines and as fuel prices continue to rise DI engines are expected to gain in popularity for automotive applications. Two exclusive sections examine light-duty and heavy-duty diesel engines. Fuel injection systems and after treatment systems for DI diesel engines are discussed. The final section addresses exhaust emission control strategies, including combustion diagnostics and modelling, drawing on reputable diesel combustion system research and development. - Investigates how HSDI and DI engines can meet ever more stringent emission legislation - Examines technologies for both light-duty and heavy-duty diesel engines - Discusses exhaust emission control strategies, combustion diagnostics and modelling
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies Publisher : ISBN 13 : Total Pages :1104 pages Book Rating :4.0/5 (1 download)
Book Synopsis Department of the Interior and Related Agencies Appropriations for 2004: Justification of the budget estimates: United States Forest Service, Department of Energy by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies
Download or read book Department of the Interior and Related Agencies Appropriations for 2004: Justification of the budget estimates: United States Forest Service, Department of Energy written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 2003 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 28th International Conference on Advanced Ceramics and Composites A by : Edgar Lara-Curzio
Download or read book 28th International Conference on Advanced Ceramics and Composites A written by Edgar Lara-Curzio and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of Papers Presented at the 28th International Conference and Exposition on Advanced Ceramics and Composites held in conjunction with the 8th International Symposium on Ceramics in Energy Storage and Power Conversion Systems.
Book Synopsis Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2004 Annual Technical Report by :
Download or read book Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2004 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 108-1 Hearings: Department of The Interior and Related Agencies Appropriations for 2004, Part 3 by :
Download or read book 108-1 Hearings: Department of The Interior and Related Agencies Appropriations for 2004, Part 3 written by and published by . This book was released on 2003 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid State Gas Sensors - Industrial Application by : Maximilian Fleischer
Download or read book Solid State Gas Sensors - Industrial Application written by Maximilian Fleischer and published by Springer Science & Business Media. This book was released on 2012-06-05 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas sensor products are very often the key to innovations in the fields of comfort, security, health, environment, and energy savings. This compendium focuses on what the research community labels as solid state gas sensors, where a gas directly changes the electrical properties of a solid, serving as the primary signal for the transducer. It starts with a visionary approach to how life in future buildings can benefit from the power of gas sensors. The requirements for various applications, such as for example the automotive industry, are then discussed in several chapters. Further contributions highlight current trends in new sensing principles, such as the use of nanomaterials and how to use new sensing principles for innovative applications in e.g. meteorology. So as to bring together the views of all the different groups needed to produce new gas sensing applications, renowned industrial and academic representatives report on their experiences and expectations in research, applications and industrialisation.
Book Synopsis Sensors, Actuators, and Microsystems (General) - 215th ECS Meeting by : G. Hunter
Download or read book Sensors, Actuators, and Microsystems (General) - 215th ECS Meeting written by G. Hunter and published by The Electrochemical Society. This book was released on 2009-10 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Sensors, Actuators, and Microsystems General Session¿, held during the 215th meeting of The Electrochemical Society, in San Francisco, CA from May 24 to 29, 2009.
Book Synopsis Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2003 Annual Technical Report by :
Download or read book Energy Materials Coordinating Committe (EMaCC): Fiscal Year 2003 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NOx Sensor Development written by and published by . This book was released on 2010 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemical Sensors 7 -and- MEMS/NEMS 7 by : Peter J. Hesketh
Download or read book Chemical Sensors 7 -and- MEMS/NEMS 7 written by Peter J. Hesketh and published by The Electrochemical Society. This book was released on 2006 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest developments in chemical and biological sensor research and development. Topics include: 1. new selective species recognition surfaces and materials; 2. molecular recognition materials and approaches to minimize non-specific binding; 3. semi-selective species recognition materials; 4. novel methods for signal processing, signal amplification, and detection; 5. detection systems for multiple analytes in complex samples; 6. sensor arrays; and 7. analytical systems and approaches.
